Energy-saving hot-process phosphoric acid method and system based on comprehensive utilization of heat energy

The invention relates to an energy-saving hot-process phosphoric acid preparation method and system based on comprehensive utilization of heat energy. The hot-process phosphoric acid mainly comprises the following main steps: preparing yellow phosphorus: taking phosphorite, silica and carbon as raw...

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Bibliographische Detailangaben
Hauptverfasser:	WANG TAO, LI LIAN, LYU YONG, YAO SHAOBIN, WANG LIN, WANG ZIYI, LYU XINRUI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF ENGINE PLANTS IN GENERAL ENGINE PLANTS NOT OTHERWISE PROVIDED FOR ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES HEATING INORGANIC CHEMISTRY LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL STEAM ACCUMULATORS STEAM ENGINE PLANTS STEAM ENGINES STEAM GENERATION SUPERHEATING OF STEAM THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to an energy-saving hot-process phosphoric acid preparation method and system based on comprehensive utilization of heat energy. The hot-process phosphoric acid mainly comprises the following main steps: preparing yellow phosphorus: taking phosphorite, silica and carbon as raw materials in an electric furnace, and preparing the yellow phosphorus under the working condition that the raw materials are heated by electric energy through an electrode to be molten; phosphoric acid preparation: in a second reaction device, mixing yellow phosphorus in a molten liquid state with air, combusting to generate phosphorus pentoxide, releasing heat energy, and reacting the generated phosphorus pentoxide with water or circulating dilute phosphoric acid in a third reaction device to obtain phosphoric acid; according to the yellow phosphorus preparation tail gas energy recovery boiler device, recovered heat energy is converted into electric energy through the power generation device. High-grade and low-gr